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Adjustable pneumatic pilot valve
The adjustable pneumatic pilot valve comprises an air pressure switching cavity, an atmospheric pressure cavity, a diaphragm working cavity and a piston working cavity, the air pressure switching cavity is provided with a first negative pressure connector and a vacuum valve control connector, and a switching valve rod is further arranged in the air pressure switching cavity; a diaphragm is arranged between the atmospheric pressure cavity and the diaphragm working cavity, one side of the diaphragm is connected with the switching valve rod, and the other side of the diaphragm is provided with an elastic element; the atmospheric pressure cavity is provided with an atmospheric pressure connector, and the diaphragm working cavity is provided with a negative pressure air supply connector and a second negative pressure connector. A piston capable of axially moving is arranged in the piston working cavity; the piston divides the piston working cavity into a first cavity and a second cavity, and an adjusting bottom cover and a first adjusting mechanism used for driving the adjusting bottom cover to move axially are arranged in the first cavity. A compression cavity is formed between the adjusting bottom cover and the piston and provided with a liquid level pressure connector, and an elastic element abutting against the piston is arranged in the second cavity. According to the invention, the application range of the liquid level height is wider, and accurate starting at the specified liquid level height within the range can be realized.
本发明涉及一种可调式气动先导阀，包括：气压切换腔、大气压腔、膜片工作腔和活塞工作腔，气压切换腔设有第一负压接口和真空阀控制接口，气压切换腔内还设有切换阀杆；大气压腔与膜片工作腔间设有膜片，膜片的一侧与切换阀杆连接，另一侧设有弹性元件；大气压腔设有大气压接口，膜片工作腔设有负压补气接口和第二负压接口；活塞工作腔中设有可轴向移动的活塞；活塞将活塞工作腔分为第一腔和第二腔，第一腔中设有调节底盖以及用于驱动调节底盖轴向移动的第一调节机构；调节底盖与活塞间形成压缩腔，压缩腔设有液位压力接口，第二腔中设有抵顶活塞的弹性元件。本发明对液位高度的适用范围更宽，并能在范围内以指定液位高度精确启动。
Adjustable pneumatic pilot valve
The adjustable pneumatic pilot valve comprises an air pressure switching cavity, an atmospheric pressure cavity, a diaphragm working cavity and a piston working cavity, the air pressure switching cavity is provided with a first negative pressure connector and a vacuum valve control connector, and a switching valve rod is further arranged in the air pressure switching cavity; a diaphragm is arranged between the atmospheric pressure cavity and the diaphragm working cavity, one side of the diaphragm is connected with the switching valve rod, and the other side of the diaphragm is provided with an elastic element; the atmospheric pressure cavity is provided with an atmospheric pressure connector, and the diaphragm working cavity is provided with a negative pressure air supply connector and a second negative pressure connector. A piston capable of axially moving is arranged in the piston working cavity; the piston divides the piston working cavity into a first cavity and a second cavity, and an adjusting bottom cover and a first adjusting mechanism used for driving the adjusting bottom cover to move axially are arranged in the first cavity. A compression cavity is formed between the adjusting bottom cover and the piston and provided with a liquid level pressure connector, and an elastic element abutting against the piston is arranged in the second cavity. According to the invention, the application range of the liquid level height is wider, and accurate starting at the specified liquid level height within the range can be realized.
本发明涉及一种可调式气动先导阀，包括：气压切换腔、大气压腔、膜片工作腔和活塞工作腔，气压切换腔设有第一负压接口和真空阀控制接口，气压切换腔内还设有切换阀杆；大气压腔与膜片工作腔间设有膜片，膜片的一侧与切换阀杆连接，另一侧设有弹性元件；大气压腔设有大气压接口，膜片工作腔设有负压补气接口和第二负压接口；活塞工作腔中设有可轴向移动的活塞；活塞将活塞工作腔分为第一腔和第二腔，第一腔中设有调节底盖以及用于驱动调节底盖轴向移动的第一调节机构；调节底盖与活塞间形成压缩腔，压缩腔设有液位压力接口，第二腔中设有抵顶活塞的弹性元件。本发明对液位高度的适用范围更宽，并能在范围内以指定液位高度精确启动。
Adjustable pneumatic pilot valve
一种可调式气动先导阀
WANG JIAN (author) / QIU JIANPING (author) / JIANG XIN (author) / SHEN KE (author) / GAN CHANG (author) / YE ZHIGUANG (author) / YU JIANFENG (author) / LIU HUIYANG (author) / XIONG HUAN (author)
2024-05-28
Patent
Electronic Resource
Chinese
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